Synopsis: After the re-emergence of the world's first mutant, world-destroyer Apocalypse, the X-Men must unite to defeat his extinction level plan.

Reaction: Not horrible, but I would definitely prefer a different design to the main big bad. Also, the villain's plan is just too cliche. Still, there are fun sequences (largely involving Quicksilver) and it's not a bad movie.

In order to explain Wolverine's cameo, Bryan Singer compared the X-Men timeline to a river and stated that even if you throw rocks into the current, the river still flows. In other words, even though the timeline was reset by X-Men: Days of Future Past certain events would still occur as they should. Even though Wolverine was saved by Mystique, who posed as William Stryker, in 1973 he would still be taken into the Weapon X program, be given his Adamantium claws, and lose his memory sometime prior to 1983.

When Wolverine escapes from his cell and starts rampaging through the military complex, he meets up with Jean Grey, Cyclops and Nightcrawler, but they don't recognize one another (simply because they have never met before in this timeline). Ironically, Hank McCoy/Beast, Peter Maximoff/Quicksilver and Raven/Mystique would have recognized Wolverine (during X-Men: Days of Future Past, Beast and Quicksilver worked with him, and Mystique delivered him into the hands of the military), but they only hear him raging from their holding cell, and never get to see him.

The after-credit scene references the Essex Group and Weapon X, setting up Nathaniel Essex / Mister Sinister as the antagonist for Logan. Logan's blood sample is also taken by Sinister (known for conducting genetic experiments). This might also lead to an on screen appearance for X23 in the Wolverine 3 film

According to Simon Kinberg, this is the final film in the First Class story arc, which also consisted of X-Men: First Class and X-Men: Days of Future Past. Kinberg calls this film the culmination of Xavier and Lensherr's relationship: "First Class was about Erik becoming empowered, the origin story of a man's power. Days of Future Past was about Charles becoming empowered, a guy who is a mess but masterminds the end of a massive event. This film has them both at their peak and finally going at each other!"

Quicksilver's X-Mansion run lasts three minutes, but took three and a half months to film; Evan Peters spent more time on set than any other actor on the film. The sequence was shot with 3-D Phantom cameras traveling at near 90 mph, while shooting at 3100 frames per second.

Simon Kinberg explains that, thanks to the time-travelling consequences of X-Men: Days of Future Past, history has been altered so that some mutants have turned out differently than in the previous films. This has enabled new versions of old characters to potentially exist and appear in these films (Cyclops, Jean Grey, Storm, Angel, Nightcrawler, Blob, William Stryker, Wolverine).

Neither are natural redheads; Turner is blonde and Janssen is brunette

Both are European; Turner is British and Janssen is Dutch.

Both are an inch taller than their co-stars playing Cyclops; Tye Sheridan is 5'8" while Turner is 5'9," and James Marsden is 5'10 while Janssen is 5'11"

Both are older than their co-stars playing Cyclops; Turner is 9 months older than Tye Sheridan and Janssen is 9 years older than James Marsden.

Apocalypse's appearance was severely criticised by fans and Internet commentators in general with many comparing it to Ivan Ooze from Mighty Morphin Power Rangers: The Movie, and criticising Oscar Isaac's normal size. Bryan Singer justified that it was the pink colored effect on the picture, and remarked that Apocalypse is able to change his size. In contrast, when Hugh Jackman was announced as Wolverine in X-Men, fans complained that he was too tall for the role (Jackman is 6' 2'' as opposed to the character's 5' 3'' in the comics).

This is the first film ever to feature all of the major "blue" mutants - Mystique, Beast, and Nightcrawler all have major roles in the film. However, Dr Hank McCoy (Beast) does appear outside of his blue form in X-Men 2.

The psychic battle between Xavier and Apocalypse was based on a concept from X-Men: First Class where Xavier and Emma Frost would have battled on a psychic plane. However, at the time the idea was considered too similar to the film Inception.

Simon Kinberg offered Olivia Munn the choice of either to play Vanessa in Deadpool or Psylocke in this film. She chose this because this film allowed her to do fighting. To prepare for her role, she had to restart her martial arts training, with an 80% vegetable diet, while losing 12 pounds for her role. For her role, Olivia Munn was advised by James McAvoy to practice sword-fighting: "I learned to use a regular sword with both hands, so I can switch in between a real sword and a CGI blade. It's more work for the special effects guys but it's pretty cool."